Originally Posted by
TiroFijo
IME, you have to make a mistake to get a primer detonation while reloading, like pressing hard on a primer with some large metal debris that acts as a firing pin.
Never had a detonation just pushing HARD (not recommended) to seat a primer of any brand, with a properly mantained press. Keep an eye on cleanliness of all parts, and anything that "feels" or "sounds" not right.
I've even decapped live primers many times (not recommended) with normal dies on the RL550, with no detonations.
You could have defective primers that are oversensitive, but that would be a VERY unusual occurrence, and impossible to avoid.